Add tests to arraysetops for empty arrays.
Add tests to arraysetops for empty arrays.

MSeifert04/numpy,githubmlai/numpy,ChristopherHogan/numpy,jonathanunderwood/numpy,BMJHayward/numpy,ahaldane/numpy,solarjoe/numpy,sonnyhu/numpy,Eric89GXL/numpy,sigma-random/numpy,has2k1/numpy,matthew-brett/numpy,ekalosak/numpy,chiffa/numpy,ChanderG/numpy,maniteja123/numpy,argriffing/numpy,naritta/numpy,rhythmsosad/numpy,MaPePeR/numpy,kiwifb/numpy,skwbc/numpy,ChanderG/numpy,anntzer/numpy,mindw/numpy,Anwesh43/numpy,BabeNovelty/numpy,dwillmer/numpy,rudimeier/numpy,mathdd/numpy,musically-ut/numpy,ewmoore/numpy,njase/numpy,Linkid/numpy,maniteja123/numpy,ContinuumIO/numpy,NextThought/pypy-numpy,MSeifert04/numpy,stuarteberg/numpy,brandon-rhodes/numpy,simongibbons/numpy,stefanv/numpy,pizzathief/numpy,jankoslavic/numpy,b-carter/numpy,yiakwy/numpy,BMJHayward/numpy,skwbc/numpy,astrofrog/numpy,musically-ut/numpy,mindw/numpy,dwf/numpy,anntzer/numpy,ekalosak/numpy,jorisvandenbossche/numpy,pelson/numpy,Anwesh43/numpy,ahaldane/numpy,ajdawson/numpy,WarrenWeckesser/numpy,madphysicist/numpy,mhvk/numpy,mingwpy/numpy,Eric89GXL/numpy,matthew-brett/numpy,argriffing/numpy,simongibbons/numpy,mwiebe/numpy,astrofrog/numpy,b-carter/numpy,stefanv/numpy,matthew-brett/numpy,larsmans/numpy,Srisai85/numpy,mhvk/numpy,larsmans/numpy,immerrr/numpy,simongibbons/numpy,Srisai85/numpy,ekalosak/numpy,dimasad/numpy,rajathkumarmp/numpy,charris/numpy,utke1/numpy,endolith/numpy,dato-code/numpy,simongibbons/numpy,WillieMaddox/numpy,chatcannon/numpy,tacaswell/numpy,has2k1/numpy,ahaldane/numpy,moreati/numpy,tynn/numpy,immerrr/numpy,nguyentu1602/numpy,nbeaver/numpy,bringingheavendown/numpy,KaelChen/numpy,has2k1/numpy,felipebetancur/numpy,Yusa95/numpy,pdebuyl/numpy,cjermain/numpy,embray/numpy,jorisvandenbossche/numpy,SunghanKim/numpy,nbeaver/numpy,b-carter/numpy,endolith/numpy,bmorris3/numpy,SiccarPoint/numpy,brandon-rhodes/numpy,jankoslavic/numpy,shoyer/numpy,utke1/numpy,tdsmith/numpy,Yusa95/numpy,ogrisel/numpy,stuarteberg/numpy,numpy/numpy-refactor,GaZ3ll3/numpy,astrofrog/numpy,stuarteberg/numpy,ContinuumIO/numpy,numpy/numpy-refactor,sonnyhu/numpy,gfyoung/numpy,WarrenWeckesser/numpy,andsor/numpy,dwillmer/numpy,yiakwy/numpy,rajathkumarmp/numpy,gfyoung/numpy,abalkin/numpy,BabeNovelty/numpy,githubmlai/numpy,shoyer/numpy,astrofrog/numpy,larsmans/numpy,charris/numpy,dch312/numpy,Linkid/numpy,dato-code/numpy,pelson/numpy,gmcastil/numpy,ssanderson/numpy,AustereCuriosity/numpy,numpy/numpy-refactor,dimasad/numpy,kirillzhuravlev/numpy,shoyer/numpy,sigma-random/numpy,kiwifb/numpy,jorisvandenbossche/numpy,madphysicist/numpy,trankmichael/numpy,mindw/numpy,gfyoung/numpy,skymanaditya1/numpy,jorisvandenbossche/numpy,matthew-brett/numpy,MaPePeR/numpy,mortada/numpy,grlee77/numpy,SunghanKim/numpy,githubmlai/numpy,numpy/numpy,KaelChen/numpy,jakirkham/numpy,jakirkham/numpy,cowlicks/numpy,githubmlai/numpy,mathdd/numpy,ChristopherHogan/numpy,cjermain/numpy,ewmoore/numpy,trankmichael/numpy,yiakwy/numpy,rherault-insa/numpy,dwf/numpy,immerrr/numpy,njase/numpy,CMartelLML/numpy,hainm/numpy,bringingheavendown/numpy,ahaldane/numpy,NextThought/pypy-numpy,charris/numpy,mwiebe/numpy,Dapid/numpy,BabeNovelty/numpy,Linkid/numpy,NextThought/pypy-numpy,ddasilva/numpy,CMartelLML/numpy,numpy/numpy,felipebetancur/numpy,chatcannon/numpy,naritta/numpy,stefanv/numpy,cowlicks/numpy,cowlicks/numpy,pyparallel/numpy,behzadnouri/numpy,CMartelLML/numpy,MSeifert04/numpy,pizzathief/numpy,ajdawson/numpy,solarjoe/numpy,felipebetancur/numpy,ogrisel/numpy,BMJHayward/numpy,pdebuyl/numpy,pyparallel/numpy,rmcgibbo/numpy,jonathanunderwood/numpy,ewmoore/numpy,BMJHayward/numpy,KaelChen/numpy,nguyentu1602/numpy,Anwesh43/numpy,jakirkham/numpy,Srisai85/numpy,mattip/numpy,has2k1/numpy,empeeu/numpy,dwf/numpy,cowlicks/numpy,drasmuss/numpy,rudimeier/numpy,WarrenWeckesser/numpy,groutr/numpy,chiffa/numpy,ESSS/numpy,mingwpy/numpy,jschueller/numpy,pbrod/numpy,mathdd/numpy,Eric89GXL/numpy,embray/numpy,madphysicist/numpy,solarjoe/numpy,embray/numpy,sigma-random/numpy,kirillzhuravlev/numpy,ajdawson/numpy,skymanaditya1/numpy,moreati/numpy,pelson/numpy,hainm/numpy,pbrod/numpy,Dapid/numpy,drasmuss/numpy,dch312/numpy,rmcgibbo/numpy,cjermain/numpy,nguyentu1602/numpy,matthew-brett/numpy,simongibbons/numpy,leifdenby/numpy,charris/numpy,GaZ3ll3/numpy,Srisai85/numpy,dwillmer/numpy,yiakwy/numpy,MaPePeR/numpy,madphysicist/numpy,rhythmsosad/numpy,ogrisel/numpy,andsor/numpy,MichaelAquilina/numpy,pyparallel/numpy,ekalosak/numpy,WarrenWeckesser/numpy,jschueller/numpy,dch312/numpy,numpy/numpy-refactor,seberg/numpy,pelson/numpy,hainm/numpy,sonnyhu/numpy,skwbc/numpy,Yusa95/numpy,jakirkham/numpy,leifdenby/numpy,pizzathief/numpy,hainm/numpy,rherault-insa/numpy,mortada/numpy,GrimDerp/numpy,ogrisel/numpy,immerrr/numpy,pbrod/numpy,mattip/numpy,felipebetancur/numpy,ssanderson/numpy,dwf/numpy,groutr/numpy,nguyentu1602/numpy,trankmichael/numpy,embray/numpy,behzadnouri/numpy,mattip/numpy,WillieMaddox/numpy,leifdenby/numpy,moreati/numpy,GrimDerp/numpy,bertrand-l/numpy,rgommers/numpy,KaelChen/numpy,GrimDerp/numpy,dato-code/numpy,brandon-rhodes/numpy,CMartelLML/numpy,numpy/numpy,numpy/numpy-refactor,shoyer/numpy,pizzathief/numpy,rgommers/numpy,rajathkumarmp/numpy,empeeu/numpy,rudimeier/numpy,chiffa/numpy,numpy/numpy,bmorris3/numpy,anntzer/numpy,cjermain/numpy,sinhrks/numpy,ssanderson/numpy,Linkid/numpy,dch312/numpy,tynn/numpy,joferkington/numpy,astrofrog/numpy,MSeifert04/numpy,MSeifert04/numpy,ddasilva/numpy,Yusa95/numpy,tynn/numpy,AustereCuriosity/numpy,tdsmith/numpy,mwiebe/numpy,sinhrks/numpy,skymanaditya1/numpy,groutr/numpy,MichaelAquilina/numpy,rherault-insa/numpy,dato-code/numpy,jonathanunderwood/numpy,dimasad/numpy,dwillmer/numpy,SunghanKim/numpy,bertrand-l/numpy,ogrisel/numpy,larsmans/numpy,ewmoore/numpy,drasmuss/numpy,ChristopherHogan/numpy,rhythmsosad/numpy,naritta/numpy,andsor/numpy,mhvk/numpy,andsor/numpy,MichaelAquilina/numpy,joferkington/numpy,behzadnouri/numpy,brandon-rhodes/numpy,Dapid/numpy,abalkin/numpy,mortada/numpy,pbrod/numpy,rgommers/numpy,stefanv/numpy,skymanaditya1/numpy,Eric89GXL/numpy,MichaelAquilina/numpy,bringingheavendown/numpy,gmcastil/numpy,ESSS/numpy,sigma-random/numpy,jschueller/numpy,njase/numpy,gmcastil/numpy,tacaswell/numpy,sinhrks/numpy,trankmichael/numpy,musically-ut/numpy,pbrod/numpy,grlee77/numpy,ESSS/numpy,tdsmith/numpy,embray/numpy,jankoslavic/numpy,bertrand-l/numpy,AustereCuriosity/numpy,mingwpy/numpy,BabeNovelty/numpy,WillieMaddox/numpy,rgommers/numpy,rmcgibbo/numpy,SunghanKim/numpy,musically-ut/numpy,rudimeier/numpy,mhvk/numpy,SiccarPoint/numpy,kirillzhuravlev/numpy,ContinuumIO/numpy,seberg/numpy,ahaldane/numpy,joferkington/numpy,ViralLeadership/numpy,madphysicist/numpy,shoyer/numpy,empeeu/numpy,mindw/numpy,grlee77/numpy,Anwesh43/numpy,tdsmith/numpy,ddasilva/numpy,GrimDerp/numpy,anntzer/numpy,ChanderG/numpy,ewmoore/numpy,stuarteberg/numpy,NextThought/pypy-numpy,naritta/numpy,bmorris3/numpy,mortada/numpy,jorisvandenbossche/numpy,seberg/numpy,jankoslavic/numpy,pdebuyl/numpy,argriffing/numpy,rhythmsosad/numpy,mingwpy/numpy,abalkin/numpy,ChristopherHogan/numpy,dwf/numpy,joferkington/numpy,MaPePeR/numpy,jakirkham/numpy,ajdawson/numpy,mathdd/numpy,kirillzhuravlev/numpy,ChanderG/numpy,SiccarPoint/numpy,WarrenWeckesser/numpy,kiwifb/numpy,empeeu/numpy,mhvk/numpy,sinhrks/numpy,sonnyhu/numpy,endolith/numpy,ViralLeadership/numpy,chatcannon/numpy,GaZ3ll3/numpy,bmorris3/numpy,pizzathief/numpy,grlee77/numpy,seberg/numpy,grlee77/numpy,rajathkumarmp/numpy,utke1/numpy,dimasad/numpy,SiccarPoint/numpy,GaZ3ll3/numpy,pelson/numpy,ViralLeadership/numpy,jschueller/numpy,endolith/numpy,maniteja123/numpy,rmcgibbo/numpy,stefanv/numpy,mattip/numpy,pdebuyl/numpy,tacaswell/numpy,nbeaver/numpy